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Optimization of surface enhanced Raman scattering performance based on Ag nanoparticle-modified vanadium-titanium nanorods with tunable nanogaps

Optics Express, ISSN: 1094-4087, Vol: 30, Issue: 21, Page: 38613-38629
2022
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Article Description

The combination of new noble metal nanomaterials and surface enhanced Raman scattering (SERS) technology has become a new strategy to solve the problem of low sensitivity in the detection of traditional Chinese medicine. In this work, taking natural cicada wing (C.w.) as a template, by optimizing the magnetron sputtering experimental parameters for the growth of Ag nanoparticles (NPs) on vanadium-titanium (V-Ti) nanorods, the nanogaps between the nanorods were effectively regulated and the Raman signal intensity of the Ag/V-Ti/C.w. substrate was improved. The proposed homogeneous nanostructure exhibited high SERS activity through the synergistic effect of the electromagnetic enhancement mechanism at the nanogaps between the Ag NPs modified V-Ti nanorods. The analytical enhancement factor (AEF) value was as high as 1.819 × 10, and the limit of detection (LOD) was 1 × 10 M for R6G. The large-scale distribution of regular electromagnetic enhancement “hot spots” ensured the good reproducibility with the relative standard deviation (RSD) value less than 7.31%. More importantly, the active compound of Artemisinin corresponded the pharmacological effect of Artemisia annua was screened out by SERS technology, and achieved a LOD of 0.01 mg/l. This reliable preparation technology was practically applicable to produce SERS-active substrates in detection of pharmacodynamic substance in traditional Chinese medicine.

Bibliographic Details

Yuan, Wenzhi; Wu, Yanjun; Zhang, Zhibin; Shi, Guochao; Han, Wei; Li, Kuihua; Gu, Jungai; Chen, Congzhe; Ge, Jialin; Zhou, Wenying; Cui, Jiahao; Wang, Mingli

Optica Publishing Group

Physics and Astronomy

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